OhmA library and language for building parsers, interpreters, compilers, etc.
ohm-editorAn IDE for the Ohm language (JavaScript edition)
left-recursionQuick explanation of eliminating left recursion in Haskell parsers
language-grammarsSyntax highlighting for ABNF/BNF/EBNF, Yacc, and other language-related languages.
autumnA Java parser combinator library written with an unmatched feature set.